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Physics

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a rock is released from rest on a 700 m building. (a) How long does it take to hit the ground? (b) what is velocity of the ball just before it hits the ground?

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Answer:

The final velocity of the rock is −44.3 m-s, and its fall time is 4.52 s.

Explanation:

There are at least two ways to solve this, one being with kinematics and the other with a combination of kinematics and energy conservation. These are just the first two that come to mind.

Hope that helps!

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